1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "gpu/command_buffer/client/gl_in_process_context.h"
6
7 #include <set>
8 #include <utility>
9 #include <vector>
10
11 #include <GLES2/gl2.h>
12 #ifndef GL_GLEXT_PROTOTYPES
13 #define GL_GLEXT_PROTOTYPES 1
14 #endif
15 #include <GLES2/gl2ext.h>
16 #include <GLES2/gl2extchromium.h>
17
18 #include "base/bind.h"
19 #include "base/bind_helpers.h"
20 #include "base/lazy_instance.h"
21 #include "base/logging.h"
22 #include "base/memory/scoped_ptr.h"
23 #include "base/memory/weak_ptr.h"
24 #include "base/message_loop/message_loop.h"
25 #include "gpu/command_buffer/client/gles2_implementation.h"
26 #include "gpu/command_buffer/client/transfer_buffer.h"
27 #include "gpu/command_buffer/common/command_buffer.h"
28 #include "gpu/command_buffer/common/constants.h"
29 #include "ui/gfx/size.h"
30 #include "ui/gl/gl_image.h"
31
32 #if defined(OS_ANDROID)
33 #include "ui/gl/android/surface_texture.h"
34 #endif
35
36 namespace gpu {
37
38 namespace {
39
40 const int32 kCommandBufferSize = 1024 * 1024;
41 // TODO(kbr): make the transfer buffer size configurable via context
42 // creation attributes.
43 const size_t kStartTransferBufferSize = 4 * 1024 * 1024;
44 const size_t kMinTransferBufferSize = 1 * 256 * 1024;
45 const size_t kMaxTransferBufferSize = 16 * 1024 * 1024;
46
47 class GLInProcessContextImpl
48 : public GLInProcessContext,
49 public base::SupportsWeakPtr<GLInProcessContextImpl> {
50 public:
51 explicit GLInProcessContextImpl();
52 virtual ~GLInProcessContextImpl();
53
54 bool Initialize(
55 scoped_refptr<gfx::GLSurface> surface,
56 bool is_offscreen,
57 bool use_global_share_group,
58 GLInProcessContext* share_context,
59 gfx::AcceleratedWidget window,
60 const gfx::Size& size,
61 const GLInProcessContextAttribs& attribs,
62 gfx::GpuPreference gpu_preference,
63 const scoped_refptr<InProcessCommandBuffer::Service>& service);
64
65 // GLInProcessContext implementation:
66 virtual void SetContextLostCallback(const base::Closure& callback) OVERRIDE;
67 virtual gles2::GLES2Implementation* GetImplementation() OVERRIDE;
68
69 #if defined(OS_ANDROID)
70 virtual scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
71 uint32 stream_id) OVERRIDE;
72 #endif
73
74 private:
75 void Destroy();
76 void OnContextLost();
77 void OnSignalSyncPoint(const base::Closure& callback);
78
79 scoped_ptr<gles2::GLES2CmdHelper> gles2_helper_;
80 scoped_ptr<TransferBuffer> transfer_buffer_;
81 scoped_ptr<gles2::GLES2Implementation> gles2_implementation_;
82 scoped_ptr<InProcessCommandBuffer> command_buffer_;
83
84 bool context_lost_;
85 base::Closure context_lost_callback_;
86
87 DISALLOW_COPY_AND_ASSIGN(GLInProcessContextImpl);
88 };
89
90 base::LazyInstance<base::Lock> g_all_shared_contexts_lock =
91 LAZY_INSTANCE_INITIALIZER;
92 base::LazyInstance<std::set<GLInProcessContextImpl*> > g_all_shared_contexts =
93 LAZY_INSTANCE_INITIALIZER;
94
GLInProcessContextImpl()95 GLInProcessContextImpl::GLInProcessContextImpl()
96 : context_lost_(false) {}
97
~GLInProcessContextImpl()98 GLInProcessContextImpl::~GLInProcessContextImpl() {
99 {
100 base::AutoLock lock(g_all_shared_contexts_lock.Get());
101 g_all_shared_contexts.Get().erase(this);
102 }
103 Destroy();
104 }
105
GetImplementation()106 gles2::GLES2Implementation* GLInProcessContextImpl::GetImplementation() {
107 return gles2_implementation_.get();
108 }
109
SetContextLostCallback(const base::Closure & callback)110 void GLInProcessContextImpl::SetContextLostCallback(
111 const base::Closure& callback) {
112 context_lost_callback_ = callback;
113 }
114
OnContextLost()115 void GLInProcessContextImpl::OnContextLost() {
116 context_lost_ = true;
117 if (!context_lost_callback_.is_null()) {
118 context_lost_callback_.Run();
119 }
120 }
121
Initialize(scoped_refptr<gfx::GLSurface> surface,bool is_offscreen,bool use_global_share_group,GLInProcessContext * share_context,gfx::AcceleratedWidget window,const gfx::Size & size,const GLInProcessContextAttribs & attribs,gfx::GpuPreference gpu_preference,const scoped_refptr<InProcessCommandBuffer::Service> & service)122 bool GLInProcessContextImpl::Initialize(
123 scoped_refptr<gfx::GLSurface> surface,
124 bool is_offscreen,
125 bool use_global_share_group,
126 GLInProcessContext* share_context,
127 gfx::AcceleratedWidget window,
128 const gfx::Size& size,
129 const GLInProcessContextAttribs& attribs,
130 gfx::GpuPreference gpu_preference,
131 const scoped_refptr<InProcessCommandBuffer::Service>& service) {
132 DCHECK(!use_global_share_group || !share_context);
133 DCHECK(size.width() >= 0 && size.height() >= 0);
134
135 // Changes to these values should also be copied to
136 // gpu/command_buffer/client/gl_in_process_context.cc and to
137 // content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h
138 const int32 ALPHA_SIZE = 0x3021;
139 const int32 BLUE_SIZE = 0x3022;
140 const int32 GREEN_SIZE = 0x3023;
141 const int32 RED_SIZE = 0x3024;
142 const int32 DEPTH_SIZE = 0x3025;
143 const int32 STENCIL_SIZE = 0x3026;
144 const int32 SAMPLES = 0x3031;
145 const int32 SAMPLE_BUFFERS = 0x3032;
146 const int32 NONE = 0x3038;
147
148 // Chromium-specific attributes
149 const int32 FAIL_IF_MAJOR_PERF_CAVEAT = 0x10002;
150
151 std::vector<int32> attrib_vector;
152 if (attribs.alpha_size >= 0) {
153 attrib_vector.push_back(ALPHA_SIZE);
154 attrib_vector.push_back(attribs.alpha_size);
155 }
156 if (attribs.blue_size >= 0) {
157 attrib_vector.push_back(BLUE_SIZE);
158 attrib_vector.push_back(attribs.blue_size);
159 }
160 if (attribs.green_size >= 0) {
161 attrib_vector.push_back(GREEN_SIZE);
162 attrib_vector.push_back(attribs.green_size);
163 }
164 if (attribs.red_size >= 0) {
165 attrib_vector.push_back(RED_SIZE);
166 attrib_vector.push_back(attribs.red_size);
167 }
168 if (attribs.depth_size >= 0) {
169 attrib_vector.push_back(DEPTH_SIZE);
170 attrib_vector.push_back(attribs.depth_size);
171 }
172 if (attribs.stencil_size >= 0) {
173 attrib_vector.push_back(STENCIL_SIZE);
174 attrib_vector.push_back(attribs.stencil_size);
175 }
176 if (attribs.samples >= 0) {
177 attrib_vector.push_back(SAMPLES);
178 attrib_vector.push_back(attribs.samples);
179 }
180 if (attribs.sample_buffers >= 0) {
181 attrib_vector.push_back(SAMPLE_BUFFERS);
182 attrib_vector.push_back(attribs.sample_buffers);
183 }
184 if (attribs.fail_if_major_perf_caveat > 0) {
185 attrib_vector.push_back(FAIL_IF_MAJOR_PERF_CAVEAT);
186 attrib_vector.push_back(attribs.fail_if_major_perf_caveat);
187 }
188 attrib_vector.push_back(NONE);
189
190 base::Closure wrapped_callback =
191 base::Bind(&GLInProcessContextImpl::OnContextLost, AsWeakPtr());
192 command_buffer_.reset(new InProcessCommandBuffer(service));
193
194 scoped_ptr<base::AutoLock> scoped_shared_context_lock;
195 scoped_refptr<gles2::ShareGroup> share_group;
196 InProcessCommandBuffer* share_command_buffer = NULL;
197 if (use_global_share_group) {
198 scoped_shared_context_lock.reset(
199 new base::AutoLock(g_all_shared_contexts_lock.Get()));
200 for (std::set<GLInProcessContextImpl*>::const_iterator it =
201 g_all_shared_contexts.Get().begin();
202 it != g_all_shared_contexts.Get().end();
203 it++) {
204 const GLInProcessContextImpl* context = *it;
205 if (!context->context_lost_) {
206 share_group = context->gles2_implementation_->share_group();
207 share_command_buffer = context->command_buffer_.get();
208 DCHECK(share_group);
209 DCHECK(share_command_buffer);
210 break;
211 }
212 }
213 } else if (share_context) {
214 GLInProcessContextImpl* impl =
215 static_cast<GLInProcessContextImpl*>(share_context);
216 share_group = impl->gles2_implementation_->share_group();
217 share_command_buffer = impl->command_buffer_.get();
218 DCHECK(share_group);
219 DCHECK(share_command_buffer);
220 }
221
222 if (!command_buffer_->Initialize(surface,
223 is_offscreen,
224 window,
225 size,
226 attrib_vector,
227 gpu_preference,
228 wrapped_callback,
229 share_command_buffer)) {
230 LOG(ERROR) << "Failed to initialize InProcessCommmandBuffer";
231 return false;
232 }
233
234 // Create the GLES2 helper, which writes the command buffer protocol.
235 gles2_helper_.reset(new gles2::GLES2CmdHelper(command_buffer_.get()));
236 if (!gles2_helper_->Initialize(kCommandBufferSize)) {
237 LOG(ERROR) << "Failed to initialize GLES2CmdHelper";
238 Destroy();
239 return false;
240 }
241
242 // Create a transfer buffer.
243 transfer_buffer_.reset(new TransferBuffer(gles2_helper_.get()));
244
245 bool bind_generates_resources = false;
246 bool free_everything_when_invisible = false;
247
248 // Create the object exposing the OpenGL API.
249 gles2_implementation_.reset(new gles2::GLES2Implementation(
250 gles2_helper_.get(),
251 share_group,
252 transfer_buffer_.get(),
253 bind_generates_resources,
254 free_everything_when_invisible,
255 command_buffer_.get()));
256
257 if (use_global_share_group) {
258 g_all_shared_contexts.Get().insert(this);
259 scoped_shared_context_lock.reset();
260 }
261
262 if (!gles2_implementation_->Initialize(
263 kStartTransferBufferSize,
264 kMinTransferBufferSize,
265 kMaxTransferBufferSize,
266 gles2::GLES2Implementation::kNoLimit)) {
267 return false;
268 }
269
270 return true;
271 }
272
Destroy()273 void GLInProcessContextImpl::Destroy() {
274 if (gles2_implementation_) {
275 // First flush the context to ensure that any pending frees of resources
276 // are completed. Otherwise, if this context is part of a share group,
277 // those resources might leak. Also, any remaining side effects of commands
278 // issued on this context might not be visible to other contexts in the
279 // share group.
280 gles2_implementation_->Flush();
281
282 gles2_implementation_.reset();
283 }
284
285 transfer_buffer_.reset();
286 gles2_helper_.reset();
287 command_buffer_.reset();
288 }
289
290 #if defined(OS_ANDROID)
291 scoped_refptr<gfx::SurfaceTexture>
GetSurfaceTexture(uint32 stream_id)292 GLInProcessContextImpl::GetSurfaceTexture(uint32 stream_id) {
293 return command_buffer_->GetSurfaceTexture(stream_id);
294 }
295 #endif
296
297 } // anonymous namespace
298
GLInProcessContextAttribs()299 GLInProcessContextAttribs::GLInProcessContextAttribs()
300 : alpha_size(-1),
301 blue_size(-1),
302 green_size(-1),
303 red_size(-1),
304 depth_size(-1),
305 stencil_size(-1),
306 samples(-1),
307 sample_buffers(-1) {}
308
309 // static
CreateContext(bool is_offscreen,gfx::AcceleratedWidget window,const gfx::Size & size,bool share_resources,const GLInProcessContextAttribs & attribs,gfx::GpuPreference gpu_preference)310 GLInProcessContext* GLInProcessContext::CreateContext(
311 bool is_offscreen,
312 gfx::AcceleratedWidget window,
313 const gfx::Size& size,
314 bool share_resources,
315 const GLInProcessContextAttribs& attribs,
316 gfx::GpuPreference gpu_preference) {
317 scoped_ptr<GLInProcessContextImpl> context(
318 new GLInProcessContextImpl());
319 if (!context->Initialize(
320 NULL /* surface */,
321 is_offscreen,
322 share_resources,
323 NULL,
324 window,
325 size,
326 attribs,
327 gpu_preference,
328 scoped_refptr<InProcessCommandBuffer::Service>()))
329 return NULL;
330
331 return context.release();
332 }
333
334 // static
CreateWithSurface(scoped_refptr<gfx::GLSurface> surface,scoped_refptr<gpu::InProcessCommandBuffer::Service> service,GLInProcessContext * share_context,const GLInProcessContextAttribs & attribs,gfx::GpuPreference gpu_preference)335 GLInProcessContext* GLInProcessContext::CreateWithSurface(
336 scoped_refptr<gfx::GLSurface> surface,
337 scoped_refptr<gpu::InProcessCommandBuffer::Service> service,
338 GLInProcessContext* share_context,
339 const GLInProcessContextAttribs& attribs,
340 gfx::GpuPreference gpu_preference) {
341 scoped_ptr<GLInProcessContextImpl> context(
342 new GLInProcessContextImpl());
343 if (!context->Initialize(
344 surface,
345 surface->IsOffscreen(),
346 false,
347 share_context,
348 gfx::kNullAcceleratedWidget,
349 surface->GetSize(),
350 attribs,
351 gpu_preference,
352 service))
353 return NULL;
354
355 return context.release();
356 }
357
358 } // namespace gpu
359